Newtown school shooting

A shooting at a Sandy Hook Elementary in Newtown, Conn., Friday left 27 people dead, including 18 children, officials said.

(Credit: News 12)

An emotional President Barack Obama addressed the nation from the White House following a shooting at Sandy Hook Elementary School in Newtown, Conn., that officials said left 27 dead, including 20 children. (Dec. 14, 2012)

(Credit: News12)

An aerial view of the scene following a shooting at Sandy Hook Elementary School in Newtown, Conn., that left 27 dead, including 20 children. (Dec. 14, 2012)

(Credit: News12)

An aerial view of Sandy Hook Elementary School in Newtown, Conn., after a shooting left 27 people dead, including 20 children. (Dec. 14, 2012)